Perhaps you should try some spelling variations:
chuong trinh » cong trinh
trinh chao » trinh chat, trinh han, trinh co
trinh cao » trinh co, tinh cao, trinh cho
trinh cau » trinh chat, trinh tu, trinh han
cong san » cong tac
soi viet » so viet, hoi viet, oi viet
cao lan » cao van, cao dang, cao tang
cong so » cong hoa
van cau » van dau, van hau, van chat
lan va » luan va, lanh va, lan van
ca cao » ca dao, cu cao, ca cac
van ca » van cua, dan ca, van ha
o soi » mo soi, o suoi, o hoi
va ca » va cac, va cao, va cai
tay o » tay co

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( chuong trinh cao lan ((van ca) OR (van cau)) tay o soi viet nam ) or ( chuong ((trinh cau) or (trinh chao)) lan va ca cao ((cong so) or (cong san)) viet nam ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( chuong trinh cao lan ((van ca) OR (van cau)) tay o soi viet nam ) OR ( chuong ((trinh cau) OR (trinh chao)) lan va ca cao ((cong so) OR (cong san)) viet nam )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( chuong trinh cao lan ((van ca) OR (van cau)) tay o soi viet nam ) or ( chuong ((trinh cau) or (trinh chao)) lan va ca cao ((cong so) or (cong san)) viet nam ))".
• Adding a wildcard symbol may retrieve word variants: (( chuong trinh cao lan ((van ca) OR (van cau)) tay o soi viet nam ) or ( chuong ((trinh cau) or (trinh chao)) lan va ca cao ((cong so) or (cong san)) viet nam ))*.